Carbureting apparatus.



F. O..LYNDE.

OARBURETING APPARATUS.

APPLIOATION FILED m3. 28, 908.

1,062,981 v Patented May 27, 1913.

' 6y, A WWW a a flw- COL"MN\ PLANOGRAPH 60-,WASHINGTON, 0. c4

ITED STATES PATENT OFFICE.

FREDERICK C. LYNDE, OF WITHINGTON, MANCHESTER, ENGLAND, ASSIGNOR OF ONE-I-IALF T0 CLEMENT VINCENT HAWORTI-I, 0F POULTON-LE-FYLDE, ENGLAND;

CARBURETING APPARATUS.

Specification of Letters Patent.

Patented May 27, 1913.

Application fi1ed March 28, 1908; Serial No. 423,823.

ratus, of which the following is a specification.

This invention relates to improvements in float valves for carburetersand the like, wherein it is essential to insure a constant level ofpetrol to obtain a uniform .feed to a carbureter.

The object of my invention is to provide a float valve which will becapable of ac curacy of control and whose operation will be automaticwithout any danger of failure due to the presence of grit and dirt, asis true of the ordinary valve.

lVith this and other objects in view, my invention consists in theconstruction and combination of parts set forth in the specification andclaim appended hereto.

In the drawings, Figure 1 shows a vertical sectional view of thecarbureter and feed-tanks provided with float valves; and Fig. 2 is ahorizontal sectional view of a float device.

For the purposes of illustration, the floatvalve device is shown inconnection with a carbureter and feed-tank, but the use of the floatvalve is in no wise limited to this particular arrangement and may beused wherever it is deemed necessary to obtain an automatic accuratecontrol of supply of liquid fuel.

Referring to Fig. 1, an arrangement is shown which illustrates oneadaptation of the float valve, wherein is a petrol main supply tank A ofany desired capacity and construction, which is connected to a smallertank B interposed at a lower level but higher than the carbureter D, andis supplied with liquid-fuel direct from A through the pipe F. From thetank B the liquid is supplied directly to a carbureter feed-tank E whichis in free connection with the carburetor D of a usual construction by asecond pipe F connecting the tank B with the feed-tank E. The pipes Gshown are air-pipes for the purpose of connecting together the upperport-ions of the various tanks.

G and C designate the float feed devices which are ofsimilar'construction and one only need be described. The device consists of afloat C of anywell known construction pivoted by set-screws N which en-I gage with the sides of the float at one end thereof, so as to allowitto be free to move with the rise and fall of the liquid-fuel containedinthe tank B. Attached at the free end of the float C is a cup H. Thiscup is movably mounted on the float by means of ascrew J which ismounted on a projection on the float and cooperates with a lug havingathreaded hole therein carried by the cup H. lVhen it is desired toadjust the cup, it may be moved vertically with -respect to the float bymeans of this screw.

The end of the pipe F is bent so as to dip into the cup which is filledwith mercury and thus affords a seal whereby nicety of control can beobtained and there is no danger of failure of the seal through thepresence of grit or dirt, as would be the case in ordinary valves.

The operation of the device will now be described: Liquidflows from thetank A through the pipe F into the tank B until it has reached therequired level, at which time the float and cup have risen so that theend of the pipe F dips into the mercury and closes the same when. theweight of the column of mercury in the cup above the end of the pipe Fis greater than that of the weight of the column of petrol in the pipe,thus cutting off the liquid supply. Liquid fuel leads through a secondpipe F from the tank B to the tank E where a similar operation takesplace. As the oil from the tank E feeds into the carbureter, the levelof the liquid fuel within the same will fall and the mercury cup,together with the float, will descend until the end of the pipe isunsealed and more liquid may flow into the tank until the proper levelis restored, and

the supply is againcut OE. With the cusfor a like movement of the valveunder varying heads of pressure. This disadvantage is overcome by thearrangement just described, as any variation of level due to thevariation of level and pressure in the main feed-tank thus takes placein the interposed tank B, and the carbureter float valve is onlysubjected to the slight variations of level and pressures which takeplace in such interposed tank. A practically constant level of liquid isthus maintained in the carbureter and a mixture of constant richnessgiven ofl. In a like manner two or more interposed tanks may be employedin series between the main supply tank and the carbureter.

The float valve described is capable of many adaptations, and it is notthe intention to limit it to the particular construction and adaptationshown but only by the scope of the claim appended hereto.

I claim- In a device of the character described, a float hinged at oneend thereof, a cup carried by said float at the free end thereof wherebysaid cup may be given an extended range of movement relative to that ofthe center of gravity of the float, and a mercury seal in said cup forcontrolling the inlet of liquid thereinto and means for adjusting theheight of said cup with respect to said float.

In witness whereof I have set my hand hereunto in the presence of twosubscribing witnesses.

FRED. G. LYNDE. lVitnesses \VILLIAM GEO. HEYs, J. OCONNELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

